[PATCH 6.1 067/217] firmware: qcom_scm: disable clocks if qcom_scm_bw_enable() fails

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gabor Juhos <j4g8y7@xxxxxxxxx>

[ Upstream commit 0c50b7fcf2773b4853e83fc15aba1a196ba95966 ]

There are several functions which are calling qcom_scm_bw_enable()
then returns immediately if the call fails and leaves the clocks
enabled.

Change the code of these functions to disable clocks when the
qcom_scm_bw_enable() call fails. This also fixes a possible dma
buffer leak in the qcom_scm_pas_init_image() function.

Compile tested only due to lack of hardware with interconnect
support.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 65b7ebda5028 ("firmware: qcom_scm: Add bw voting support to the SCM interface")
Signed-off-by: Gabor Juhos <j4g8y7@xxxxxxxxx>
Reviewed-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240304-qcom-scm-disable-clk-v1-1-b36e51577ca1@xxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/firmware/qcom_scm.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 58f1a86065dc9..619cd6548cf64 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -495,13 +495,14 @@ int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size,
 
 	ret = qcom_scm_bw_enable();
 	if (ret)
-		return ret;
+		goto disable_clk;
 
 	desc.args[1] = mdata_phys;
 
 	ret = qcom_scm_call(__scm->dev, &desc, &res);
-
 	qcom_scm_bw_disable();
+
+disable_clk:
 	qcom_scm_clk_disable();
 
 out:
@@ -563,10 +564,12 @@ int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr, phys_addr_t size)
 
 	ret = qcom_scm_bw_enable();
 	if (ret)
-		return ret;
+		goto disable_clk;
 
 	ret = qcom_scm_call(__scm->dev, &desc, &res);
 	qcom_scm_bw_disable();
+
+disable_clk:
 	qcom_scm_clk_disable();
 
 	return ret ? : res.result[0];
@@ -598,10 +601,12 @@ int qcom_scm_pas_auth_and_reset(u32 peripheral)
 
 	ret = qcom_scm_bw_enable();
 	if (ret)
-		return ret;
+		goto disable_clk;
 
 	ret = qcom_scm_call(__scm->dev, &desc, &res);
 	qcom_scm_bw_disable();
+
+disable_clk:
 	qcom_scm_clk_disable();
 
 	return ret ? : res.result[0];
@@ -632,11 +637,12 @@ int qcom_scm_pas_shutdown(u32 peripheral)
 
 	ret = qcom_scm_bw_enable();
 	if (ret)
-		return ret;
+		goto disable_clk;
 
 	ret = qcom_scm_call(__scm->dev, &desc, &res);
-
 	qcom_scm_bw_disable();
+
+disable_clk:
 	qcom_scm_clk_disable();
 
 	return ret ? : res.result[0];
-- 
2.43.0







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